wordpress-automatic-upgrade hasn’t appeared in my blog menu

I have uploaded the wordpress-automatic-upgrade folder to the /wp-content/plugins/directory, but there is not the plugin in my’Plugins’ menu for me to activate it.

I want to upgrade my wordpress to 2.6.2, does the automatic-upgrade plugin replace the process to upgrade to 2.6.2 (new version) for it is named “automatic-upgrade”?